Briquet and process of making the same.



- UNITED Tli.

A T OFFICE.

JACOB s. ROBESON, OF CAMDEN, NEW JERSEY, ASSIGNOR TO ROBESON PEoCEssCOMPANY, OF CAMDEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BRIQUET AND PROCESS OF MAKING THE SAME.

museums.

To all w am it may concern:

Be it known that I, JACOB S.,ROBESON, a citizen of the United States,and a resident of Camden Camden county, New Jersey, have inventedcertain Improvements in Bri uets and Processes of Making the Same, of w'ch 2 the following is a s ecification.

My invention re ates to the manufacture of 4 briquets from inorganicmaterial, notably I briquet of inorganic material bonded with a compoundcomprising Waste sulfite liquor and Wood-tar, and the specificembodiment of my invention is a bri net of iron ore bonded by suchmaterialand afterward subjected to a temperature of about 500Fahrenheit, whereby it is hardened and at the same time one-half of thesulfur content of the binder is driven ofi.

My invention comprises, further, the method or process of making thisimproved com osition of matter.

T e bonding agent consists of an improved compound comprising a mass ofsulfite liquor and Wood-tar or pitch, as the material particularly fromconiferous woods is sometimes called. By the term Wood-tar (or pitch) ismeant the heavy liquid residue from the condensed products of thedestructive distillation of woody tissues in the manufacture ofpyroligneous acid and methyl alcohol, &c.

In the manufacture of cellulose or paperpulp under What is known as thesulfite process, which consists in boiling Wood and other fibers underpressure in a solution containing sulfurous acid and, a base, such aslime or magnesia, a vast quantity of a Watery mixture known as wastesulfite liquor is produced that hitherto has i' ad little value,

esides being highly objectionable in a number of ways and verydifiicultof disposal. In preparing the compound for use in carry-Speciflcation of Letters Patent. Application illed June 9,1906. SerialNo. 320.991.

Patented Jan. 22, 1907.

ing the method or process of my present invention into effect I emplo aconcentrated or evaporated solution of t e same, preferring to use aneutral undecomposed and concentrated mass of this waste liquor made inaccordance with a method I have developed.

for utilizing such material. In my Patent No. 833,634, dated October 16,1906, I have set forth a process of treating this raw Waste 1i uor byrendering it substantially neutral With the aid Of milk of lime or othersuitable alkaline material and then quickly concen trating suchneutralized body in vacuo without decomposition to a desirable densit Inthe preferred method or process of ma ing in improved binding agent Ipropose to use this substantially neutral, undecomposed, andconcentrated mass of sulfite liquor made in accordance with the process.

above set forth, and to a quantity of this li uor at a density of about30 Baum I a d the same quantity, by volume, of woodtar of substantiallythe same density. In practice I have found that the emulsion formed bythis combination of the neutral and concentrated waste sulfite liquorand the waste product commonly known as Woodtar produced a compositionof matter having adhesive properties of a high degree and possesses thefurther characteristic of being non-hygroscopic, rendering it highlyvaluable for use as a binder in the briqueting of all forms of inorganicmineral matter, notably the ores of the various metals, particularlyiron ore, and all forms of carbonaceous fuel.

I may add the Wood-tar at the same density as the concentrated sulfiteli uor, which compound thus formed is ready or practical use or may, ifdesired for any purpose, be subsequently reduced in density forpractical use, by the addition of an aqueous liquid, or a combination ofthe ingredients may be made in a relatively vthin condition in Which thematerial ma under some circumstance be employed. i or many purposes thedensity may be reduced by heat, and this Will permit a better admixturewith the material to be briqueted.

The combined mixture is preferably subjected to the action of heat toinsure the intimate and complete admixture of the ingredients thereof,although substantially satisfactory results can be secured by mlxlng theingredients at ordinary temperatures.

In Preparing the ore or other morgamc material for briqueting arelatively small portion of the binding compound is mixed therewith. Thequantity will depend entirely upon the material operated upon, and, asmay be well understood, fuel of a bitunilnous character will require asmaller proportion of the binder than other forms of inorganicmaterial-iron ore, for instance.- In practice I have had satisfactoryresults with a mixture of about ninety-seven and one-half. per cent. ofiron ore, preferably in a finelydivided state, and about two andone-half per cent. .of the binding agent.

As my improved binding agent carries a small amount of sulfur, wh1ch inthe case of iron-ore briquets would injuriously affect the finished1ron, I heat such briquets after they have left the shaping-press to atemper ature not less than 500 Fahrenheit, which action has the effectof hardenin the same, and at the same time drives off fuTly one-half ofthe sulfur content of the binder.

I claim 4 1. As a new article of manufacture, a briquet of inorganicmaterial, bonded by a composition of matter consisting of sulfiteliquor; and the liquid residue from the destructive distillation ofwoody tissue.

2. As a new article of manufacture, a briquet of inorganic material,bonded by a composition of matter consisting of sulfite liquor andwood-tar.

3. As a new article of manufacture, a briquet of inorganic material,bonded by a composition of matter consisting of concentrated sulfiteliquor, and the liquid residue from the destructive distillation ofwoody tissue.

4. As a new article of manufacture, a briquet of inorganic material,bonded by a composition of matter consisting of concentrated sulfiteliquor and wood-tar.

5. As a new article of manufacture, an iron ore briquet, bonded'by acomposition of matter consisting of sulfiteliquor, and the liquidresidue from the destructive distillation of woody tissue.

6. As a new article of manufacture, an iron ore briquet, bonded byacomposition of matter consisting of sulfite liquor and woodtar.

7. As a new article of manufacture, an iron ore'briquet, bonded by acomposition of matter consisting of concentrated sulfite liquor, and theliquid residue from the destructive distillation of woody tissue.

8. As a new article of manufacture, an iron ore briquet, bonded by acomposition of matter consisting of concentrated sulfite due from thedestructive distillation of woody tissue, and then subjecting suchmaterial to pressure to form the desired shapes or masses.

10. The process of making briquets of inorganic material, whichCOIlSlStS in mixing the material to form the briquets with a bindercomprising sulfite liquor and Wood-tar in a heated condition, and thensubjecting such material to pressure to form the desired shapes ormasses.

11. The process of making ore briquets, which consists in mixing the orewith a binder comprising sulfite liquor and the liquid residue from thedestructive distillation of woody tissue, subjecting such material topressure to form the desired shapes or masses, and then heating saidbriquets to a degree suflicient to expel a portion of the sulfur carriedby the bonding agent.

12. The process of making ore briquets, which consists in mixing the orewith a binder comprising sulfite liquor and woodtar in a heatedcondition, subjecting such material to pressure to form the desiredshapes or masses, and then heating said briquet to a degree sufiicientto expel a portionof the sulfur carried by the bonding agent.

13. The process of making briquets of inorganic material, which consistsin mixing the material to form the briquets with a binder comprisingconcentrated sulfite 1i uor and the liquid residue from the destructivedistillation of woody tissue, and then subjecting such material topressure to form the desired shapes or masses.

l t. The process of making briquets of inorgamc material, which consistsin mixing the material to form the briquets with a binder 'comprisingconcentrated sulfite liquor and wood-tar in a heated condition, and thensubjecting such material to pressure to form the desired shapes ormasses.

15. The process of making ore briquets, which consists in mixing the orewith a binder comprising concentrated sulfite liquor and the liquidresidue from the destructive distillation of woody tissue, subjectingsuch I I material to pressure to form the desired shapes or masses, andthen heating said briquet to a degree sufficient to expel a portion ofthe sulfur carried by the bonding agent.

1 6. The process of making ore briquets, which consists in mixing theore wlth a binder comprising concentrated sulfite liquor I and wood-tarin a heated condition, subjeetname to this specification in the presenceof ing such material to pressgre to form the de two subscribingWitnesses. sired shapes or masses an then heating sai *1 T briquet to adegreesuifieient to expel a por- JACOB ROBEbO1\' agent. MURRAY 0. BOYER,

tion of the sulfur earried by the bonding Witnesses:

In testimony whereof I have signed my Jos. H. KLEIN.

